People wait in line to vote in Miami on Election Day Tuesday, Nov. 6, 2012. (AP Photo/El Nuevo Herald, David Santiago) MAGS OUT

Photo: David Santiago, Associated Press

People wait in line to vote in Miami on Election Day Tuesday, Nov....

People wait in line to vote in Miami on Election Day Tuesday, Nov.... Photo-3699267.51982 - SFGate

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EADS, CO - NOVEMBER 06: Voter Matt Smith (R) signs in with election judge Justin Crow (L) and volunteer Areta Blooding-Laird (C) in Kiowa County Precinct Two at the Eads Senior Citizens Center on November 6, 2012 in Eads, Colorado. Colorado is considered a swing state in the presidential race, with a prize of nine electoral votes. (Photo by Doug Pensinger/Getty Images)

WASHINGTON - NOVEMBER 6: People wait in line to vote at the Columbia Heights Educational Campus on Tuesday, November 6, 2012 in Washington, DC. The latest polls continue to show a tight race between President Barack Obama and Republican challenger Mitt Romney. (Photo by Brendan Hoffman/Getty Images)

Photo: Brendan Hoffman, Getty Images

WASHINGTON - NOVEMBER 6: People wait in line to vote at the...

WASHINGTON - NOVEMBER 6: People wait in line to vote at the... Photo-3699273.51982 - SFGate

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Bloomdale, OH - NOVEMBER 6: Misty Schinsky votes while holding her son, Parker, 1, and daughter, Calley, 3, looking on, November 6, 2012 in Bloomdale, Ohio. Voting is underway in the US presidential election in the battleground state of Ohio. Recent polls show that U.S. President Barack Obama and Republican presidential candidate Mitt Romney are in a tight race. (Photo by J.D. Pooley/Getty Images)

NEW YORK, NY - NOVEMBER 06: Rockaway residents wait on line to cast their ballots in an unheated makeshift tent set up as a polling place at Scholars' Academy, PS 180, in the Rockaway neighborhood on November 6, 2012 in the Queens borough of New York City. The Rockaway section of Queens was one of the hardest hit areas. Many voters in New York and New Jersey are voting at alternate locations in the presidential election due to disruption from Superstorm Sandy. (Photo by Mario Tama/Getty Images)

NEW YORK, NY - NOVEMBER 06: Rockaway resident Sheresa Walker (L) uses a flashlight as poll worker Lloyd Edwards assists before voting in a makeshift tent set up as a polling place at Scholars' Academy, PS 180, in the Rockaway neighborhood on November 6, 2012 in the Queens borough of New York City. The Rockaway section of Queens was one of the hardest hit areas. Many voters in New York and New Jersey are voting at alternate locations in the presidential election due to disruption from Superstorm Sandy. (Photo by Mario Tama/Getty Images)

BOSTON, MA - NOVEMBER 06: A man takes a photo with a smartphone in front of the stage during Mitt Romney's campaign election night event at the Boston Convention & Exhibition Center on November 6, 2012 in Boston, Massachusetts. Voters went to polls in the heavily contested presidential race between incumbent U.S. President Barack Obama and Republican challenger Mitt Romney. (Photo by Matthew Cavanaugh/Getty Images)

Matt Novick, of Southwest Ranches, sits in a chair while waiting in line to vote at the Southwest Regional Library in Pembroke Pines, Fla. on Election Day Tuesday, Nov. 6, 2012. (AP Photo/The Miami Herald, Joe Rimkus Jr.) MAGS OUT

Photo: Joe Rimkus Jr., Associated Press

Matt Novick, of Southwest Ranches, sits in a chair while waiting in...

Avery Davis, 4, passes the time lying on his back as his mother, Samantha Davis, 30, votes in the the general election at the Mona Shores Middle School gym in Norton Shores, Mich., on Tuesday, Nov. 6, 2012. They waited nearly an hour for Samantha to vote. (AP Photo/The Muskegon Chronicle, Ken Stevens) ALL LOCAL TV OUT; LOCAL TV INTERNET OUT

Photo: Ken Stevens, Associated Press

Avery Davis, 4, passes the time lying on his back as his mother,...

Avery Davis, 4, passes the time lying on his back as his mother,... Photo-3699281.51982 - SFGate

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Man'Yari Vance, 1, naps on his grandmother, Angela Robertson's lap, as she casts her ballot at Hope Lighthouse Church on Election Day, Tuesday, Nov.6, 2012, in Muskegon Heights, Mich. After a grinding presidential campaign President Barack Obama and Republican presidential candidate, former Massachusetts Gov. Mitt Romney, yield center stage to American voters Tuesday for an Election Day choice that will frame the contours of government and the nation for years to come. (AP Photo/The Muskegon Chronicle, Ken Stevens) ALL LOCAL TV OUT; LOCAL TV INTERNET OUT

Voters wait in a line, stretching several blocks, to cast votes for national and local candidates on Tuesday, Nov. 6, 2012 in the Flatbush section of Brooklyn, N.Y. Voting in the U.S. presidential election was the latest challenge for the hundreds of thousands of people in the New York-New Jersey area still affected by Superstorm Sandy, as they struggled to get to non-damaged polling places to cast their ballots in one of the tightest elections in recent history. (AP Photo/Bebeto Matthews)

Photo: Bebeto Matthews, Associated Press

Voters wait in a line, stretching several blocks, to cast votes for...

Residents of the Dutchman Shores area vote at the Crossroads Fire... Photo-3699284.51982 - SFGate

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Lawn signs from a countless number of campaigns fill the median strip on Sacramento Street in Berkeley, Calif. on Tuesday, Nov. 6, 2012.

Photo: Paul Chinn, The Chronicle

Lawn signs from a countless number of campaigns fill the median...

Lawn signs from a countless number of campaigns fill the median... Photo-3699285.51982 - SFGate

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Election official John James watches over the voting on Election Day, Tuesday, Nov. 6, 2012, at the Elizaville precinct in Elizaville, Ky. The precinct is located in Flora's Grocery Store, built in 1821. (AP Photo/John Flavell)

Photo: John Flavell, Associated Press

Election official John James watches over the voting on Election...

Election official John James watches over the voting on Election... Photo-3701123.51982 - SFGate

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Voters stand in line at a Fort Myers, Fla. church late Tuesday, Nov. 6, 2012. After a grinding presidential campaign President Barack Obama and Republican presidential candidate, former Massachusetts Gov. Mitt Romney, yield center stage to American voters Tuesday for an Election Day choice that will frame the contours of government and the nation for years to come. (AP Photo/J Pat Carter)

Photo: J Pat Carter, Associated Press

Voters stand in line at a Fort Myers, Fla. church late Tuesday,...

Voters stand in line at a Fort Myers, Fla. church late Tuesday,... Photo-3701124.51982 - SFGate

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Voters line up to cast their vote at the Boston Public Library November 6, 2012 in Boston, Massachusetts. The final national polls showed an effective tie, with either US President Barack Obama or Republican challenger Mitt Romney favored by a single point in most surveys. AFP PHOTO / TIMOTHY A. CLARYTIMOTHY A. CLARY/AFP/Getty Images

Photo: Timothy A. Clary, AFP/Getty Images

Voters line up to cast their vote at the Boston Public Library...

Voters line up to cast their vote at the Boston Public Library... Photo-3701120.51982 - SFGate

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Voters cast their ballot at the Boston Public Library November 6, 2012 in Boston, Massachusetts. The final national polls showed an effective tie, with either US President Barack Obama or Republican challenger Mitt Romney favored by a single point in most surveys. AFP PHOTO / TIMOTHY A. CLARYTIMOTHY A. CLARY/AFP/Getty Images

Photo: Timothy A. Clary, AFP/Getty Images

Voters cast their ballot at the Boston Public Library November 6,...

Voters cast their ballot at the Boston Public Library November 6,... Photo-3701121.51982 - SFGate

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ALEXANDRIA, VA - NOVEMBER 06: People wait inside Washington Mill Elementary School to cast their vote in the U.S. presidential race, on November 6, 2012, in Alexandria, Virginia. Recent polls show that U.S. President Barack Obama and Republican presidential candidate Mitt Romney are in a tight race. (Photo by Patrick Smith/Getty Images)

STERLING HEIGHTS, MI, - NOVEMBER 6: U.S. citizens line up to vote in the presidential election at Carleton Middle School November 6, 2012 in Sterling Heights, Michigan. Recent polls show that U.S. President Barack Obama and Republican presidential candidate Mitt Romney are in a tight race. (Photo by Bill Pugliano/Getty Images)

Photo: Bill Pugliano, Getty Images

STERLING HEIGHTS, MI, - NOVEMBER 6: U.S. citizens line up to vote...

STERLING HEIGHTS, MI, - NOVEMBER 6: U.S. citizens line up to vote... Photo-3701115.51982 - SFGate

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MILFORD, VA - NOVEMBER 06: People wait in line to vote at Caroline High School on November 6, 2012 in Milford, Virginia. The swing state of Virginia is recognised to be a hotly contested battleground that offers 13 votes, with recent polls showing that the race between U.S. President Barack Obama and Republican presidential candidate Mitt Romney remains tight. (Photo by Mark Wilson/Getty Images)

Photo: Mark Wilson, Getty Images

MILFORD, VA - NOVEMBER 06: People wait in line to vote at Caroline...

MILFORD, VA - NOVEMBER 06: People wait in line to vote at Caroline... Photo-3701118.51982 - SFGate

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ST. PETERSBURG, FL - NOVEMBER 6: Lines of voters wait in the rain to cast their vote on November 6, 2012 in St. Petersburg, Florida. The swing state of Florida is recognised to be a hotly contested battleground that offers 29 electoral votes, as recent polls predict that the race between U.S. President Barack Obama and Republican presidential candidate Mitt Romney remains tight. (Photo by Edward Linsmier/Getty Images)

Photo: Edward Linsmier, Getty Images

ST. PETERSBURG, FL - NOVEMBER 6: Lines of voters wait in the rain...

ST. PETERSBURG, FL - NOVEMBER 6: Lines of voters wait in the rain... Photo-3701111.51982 - SFGate

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MANCHESTER, NH - NOVEMBER 6: A young girl looks out from a voting booth as her mother casts her ballot at the Bishop Leo O'Neil Youth Center on November 6, 2012 in Manchester, New Hampshire. The swing state of New Hampshire is recognised to be a hotly contested battleground that offers 4 electoral votes, as recent polls predict that the race between U.S. President Barack Obama and Republican presidential candidate Mitt Romney remains tight. (Photo by Edward Linsmier/Getty Images)

Photo: Darren McCollester, Getty Images

MANCHESTER, NH - NOVEMBER 6: A young girl looks out from a voting...

MANCHESTER, NH - NOVEMBER 6: A young girl looks out from a voting... Photo-3701112.51982 - SFGate

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BOWLING GREEN, OH - NOVEMBER 6: Voters cast their ballots at an elementary school on November 6, 2012 in Bowling Green, Ohio. Voting is underway in the US presidential election in the battleground state of Ohio. Recent polls show that U.S. President Barack Obama and Republican presidential candidate Mitt Romney are in a tight race. (Photo by J.D. Pooley/Getty Images)

Diners line up at the Brownwood Coliseum on Election Day, Tuesday, Nov. 6, 2012, in Brownwood, Texas. Each year the Kiwanis Club holds their Pancake Supper on Election Day, this year being the 60th anniversary. (AP Photo/The Abilene Reporter-News, Ronald W. Erdrich)

Photo: Ronald W. Erdrich, Associated Press

Diners line up at the Brownwood Coliseum on Election Day, Tuesday,...

Diners line up at the Brownwood Coliseum on Election Day, Tuesday,... Photo-3701107.51982 - SFGate

Crowds in Times Square watch election results, Tuesday, Nov. 6, 2012, in New York. After a year of campaigning, polls have begun to close after Americans across the United States headed to the polls to decide the winner of the tight presidential race between President Barack Obama and Republican presidential candidate, former Massachusetts Gov. Mitt Romney. (AP Photo/ John Minchillo)

A woman poses after placing a mock vote during a US presidential election results event organised by the US embassy in Beijing on November 7, 2012. Barack Obama and Mitt Romney steeled themselves for nervous hours as polls closed in the first of the key swing states that will decide their tight and bitter White House duel. AFP PHOTO / Ed JonesEd Jones/AFP/Getty Images

Photo: Ed Jones, AFP/Getty Images

A woman poses after placing a mock vote during a US presidential...

A woman poses after placing a mock vote during a US presidential... Photo-3701101.51982 - SFGate

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LAS VEGAS, NV - NOVEMBER 06: Alicia Hayes reacts as she watches the returns during an election night watch party at The Venetian on November 6, 2012 in Las Vegas, Nevada. Voters went to polls in the heavily contested presidential race between incumbent U.S. President Barack Obama and Republican challenger Mitt Romney. (Photo by David Becker/Getty Images)

Signs are et up near the Mt. Pleasant Library November 6, 2012 in Cleveland, Ohio. Citizens around the United States head to the polls to vote on the country's next president including in Ohio, a state with 18 electoral votes, were the race between US President Barack Obama and Mitt Romney is very close. AFP PHOTO/Brendan SMIALOWSKIBRENDAN SMIALOWSKI/AFP/Getty Images

Photo: Brendan Smialowski, AFP/Getty Images

Signs are et up near the Mt. Pleasant Library November 6, 2012 in...

Signs are et up near the Mt. Pleasant Library November 6, 2012 in... Photo-3701099.51982 - SFGate

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A view of the Empire State Building in New York, New York that is projecting an LED illuminated meter to show the results of the 2012 Presidential Election as CNN counts the numbers of electoral votes for each candidate, showing US President Barack Obama in blue and Mitt Romney in red, as polling in each state closes on November 6, 2012. AFP PHOTO/Mehdi TaamallahMEHDI TAAMALLAH/AFP/Getty Images

Photo: Mehdi Taamallah, AFP/Getty Images

A view of the Empire State Building in New York, New York that is...

A view of the Empire State Building in New York, New York that is... Photo-3701095.51982 - SFGate

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BOWLING GREEN, OH - NOVEMBER 6: A man casts his ballot using an electronic voting machine November 6, 2012 at an elementary school in Bowling Green, Ohio. Voting is underway in the US presidential election in the battleground state of Ohio. Recent polls show that U.S. President Barack Obama and Republican presidential candidate Mitt Romney are in a tight race. (Photo by J.D. Pooley/Getty Images)

A voters cast her ballot at the Bremen Area Historical Society polling station in Bremen, Ohio, U.S., on Tuesday, Nov. 6, 2012. The U.S. presidential race remained too close to call in early returns in several of the main battleground states as polls closed in Ohio, Virginia, Florida and North Carolina. Photographer: Ty Wright/Bloomberg

Photo: Ty Wright, Bloomberg

A voters cast her ballot at the Bremen Area Historical Society...

A voters cast her ballot at the Bremen Area Historical Society... Photo-3701098.51982 - SFGate

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MADISON, WI - NOVEMBER 6: A supporter for U.S. Senate candidate U.S. Rep. Tammy Baldwin (D-WI) watches as poll numbers come in on election night November 6, 2012 in Madison, Wisconsin. Winning tonight's race would make her Wisconsin's first openly gay Senator in history. (Photo by Darren Hauck/Getty Images)